DS18B20 Temp sensors stopped working

[cvachon79]

I can do that. Should I order the 4.7k Ohm Resistor?

[ben]

I can do that. Should I order the 4.7k Ohm Resistor?

I would try anything you have around (if you have something around) before you order anything.

Anywhere between 1k and 5k preferably.

[cvachon79]

I ordered a pack of 4.7k Ohm Resistors on Amazon.
I added resistors on the 5V line and DATA line. Voltages did no change (I took measurements with and without a sensor connected). I also added a resistor on the GND line and it made no difference.

GND and V lines = 5V
GND and DATA = 1.3V
V line and DATA = 3.8V

[cvachon79]

I ordered a pack of 4.7k Ohm Resistors on Amazon.
I added resistors on the 5V line and DATA line. Voltages did no change (I took measurements with and without a sensor connected). I also added a resistor on the GND line and it made no difference.

GND and V lines = 5V
GND and DATA = 1.3V
V line and DATA = 3.8V

After trying the 4.7k resistors I had no luck... any other advice? I'm hoping that module in the GEM is not dead.

[ben]

After trying the 4.7k resistors I had no luck... any other advice? I'm hoping that module in the GEM is not dead.

With no power applied, there should be about 5k ohms between GND/Data. Can you check that with your multimeter?

[cvachon79]

After trying the 4.7k resistors I had no luck... any other advice? I'm hoping that module in the GEM is not dead.

With no power applied, there should be about 5k ohms between GND/Data. Can you check that with your multimeter?

With the unit disconnected from the wall (both power supplies) I measured 2.33k ohms between GND and Data.

[ben]

After trying the 4.7k resistors I had no luck... any other advice? I'm hoping that module in the GEM is not dead.

With no power applied, there should be about 5k ohms between GND/Data. Can you check that with your multimeter?

With the unit disconnected from the wall (both power supplies) I measured 2.33k ohms between GND and Data.

Without anything connected? (Including the 4.7k ohm pullup).

[ben]

It sounds like with the lightning the port that controls the 1-wire was damaged.

Does everything else work?

[cvachon79]

It sounds like with the lightning the port that controls the 1-wire was damaged.

Does everything else work?

Correct - nothing connected including the pull-up. I have not noticed any other problems with the GEM.

[ben]

It sounds like with the lightning the port that controls the 1-wire was damaged.

Does everything else work?

Correct - nothing connected including the pull-up. I have not noticed any other problems with the GEM.

It's possible to have just fried the one port without it affecting any other functions of the GEM.

I'll send you over an email.